10-1B Conduction in Action Purpose: To investigate the rate of conductivity through different metals Materials:
· Four 8 cm conduction bars (steel, brass, copper, aluminum) · Felt pen · Ruler · Wax strips of wood · Stopwatch · Graph paper · Colored pens or pencil crayons Procedure: see pg.432 Table:
Time (s)
Distance (cm)
Aluminum
Zinc
Copper
Lead
Carbon
Tin
0.0
0.0
0.0
0.0
0.0
0.0
0.0
2.0
9.40
2.0
6.0
1.81
23.0
3.0
4.0
11.5
4.13
10.0
4.08
30.0
8.0
6.0
13.50
6.0
18.0
10.8
39.0
16.0
8.0
17.08
9.5
29.0
15.6
54.0
34.0
Analyze
1. The droplets of wax along the metal bars were melting one by one. Here, heat was transferring from a higher temperature substance to a lower temperature substance. This shows that the bars were conducting heat and that it was being distributed along the bars.
2. a) No, some metals conducted heat better/worse than others.
b) Copper, Aluminum, Zinc, Tin, Lead, Carbon. Conclude and Apply 1. Kinetic molecular theory states that the more particles are heated the faster they will move, allowing them to collide. The heat given off from the flame and to the metal bars, allows particles to gain energy. Here, the metal bars give off the heat received from the flame to the candle wax, allowing the wax to gain heat and to melt.
2. A Carbon based mixer would be the safest choice. Carbon is the worst conductor of heat in the options above. It is an insulator, which means it is a bad conductor of heat. This means that it would stay fairly cool making it easy to handle and to mix hot mixtures. Conclusion Due to this experiment I learnt that the rate of conduction is related to kinetic molecular theory. And, how conduction is linked to molecules heating up and moving faster, thus colliding with each other. It also helped me understand the direction of heat transfer, higher temperature areas to lower temperature area. Like, when the flam heated the bars and the wax which were both cool to start with. It also helped me understand that different metals have different rates of conductivity. For example, Copper was very conductive whereas in Carbon was the least conductive. By better understanding this concept I now understand the many uses of it. We can control many safety issues with this in our everyday lives. Sana;Javaheri
Purpose: To investigate the rate of conductivity through different metals
Materials:
· Four 8 cm conduction bars (steel, brass, copper, aluminum)
· Felt pen
· Ruler
· Wax strips of wood
· Stopwatch
· Graph paper
· Colored pens or pencil crayons
Procedure: see pg.432
Table:
Analyze
1. The droplets of wax along the metal bars were melting one by one. Here, heat was transferring from a higher temperature substance to a lower temperature substance. This shows that the bars were conducting heat and that it was being distributed along the bars.
2. a) No, some metals conducted heat better/worse than others.
b) Copper, Aluminum, Zinc, Tin, Lead, Carbon.
Conclude and Apply
1. Kinetic molecular theory states that the more particles are heated the faster they will move, allowing them to collide. The heat given off from the flame and to the metal bars, allows particles to gain energy. Here, the metal bars give off the heat received from the flame to the candle wax, allowing the wax to gain heat and to melt.
2. A Carbon based mixer would be the safest choice. Carbon is the worst conductor of heat in the options above. It is an insulator, which means it is a bad conductor of heat. This means that it would stay fairly cool making it easy to handle and to mix hot mixtures.
Conclusion
Due to this experiment I learnt that the rate of conduction is related to kinetic molecular theory. And, how conduction is linked to molecules heating up and moving faster, thus colliding with each other. It also helped me understand the direction of heat transfer, higher temperature areas to lower temperature area. Like, when the flam heated the bars and the wax which were both cool to start with. It also helped me understand that different metals have different rates of conductivity. For example, Copper was very conductive whereas in Carbon was the least conductive. By better understanding this concept I now understand the many uses of it. We can control many safety issues with this in our everyday lives.
Sana;Javaheri